[Coco] CoCo Use Poll

[Dave Philipsen]

Actually there are a number of enhancements on the CoCo3FPGA beside the fact that it runs the 6809 core at 25 MHz.  It has a 640x450 256-color graphics mode.  It has an extension to the Orch-90 spec that uses 16-bit DACs.  It has an extension to the joystick ADCs that allows for 12-bit resolution.  It has a direct memory addressing scheme which uses a 24-bit address register and bypasses the MMU with auto-increment capabilities. I could go on...

Dave

> On Feb 25, 2018, at 3:18 PM, Mark McDougall <msmcdoug at iinet.net.au> wrote:
> 
> On 26/02/2018 1:57 AM, Francis Swygert wrote:
> 
> IIRC the DE-1 based model has some enhanced graphics, but I am under the impression that the other (forget what it's based on) is strictly CoCo3 compatible, no enhancements, just mods to use the board hardware.
> 
> IIUC it's the other way around. Roger Taylor's Coco-On-A-Chip (DE-Nano boards) has a lot of enhancements including graphics modes, where-as Gary's Coco3FPGA (DE1) has little in the way of enhancements that add new features to the original capabilities (aside from connectivity, secondary storage etc).
> 
> Regards,
> 
> -- 
> Mark McDougall
> <http://retroports.blogspot.com.au>
> 
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